👉 A rhombohedron is a polyhedron consisting of six equilateral triangular faces, each with an edge length equal to one half of the side length. The name "rhombohedron" comes from the Greek word "rhombos," which means "square," and "hedron" which means "cube." It's often represented by its three vertices (A, B, C) forming a rhombic dodecahedron or a tetrahedron.